The Spanish CGT (Union of General Labor, not to be confused with the French CGT) is another anarcho-syndicalist union that split from the CNT after a dispute about whether to receive government money in 1979. It is small, but is a functioning union, anarcho-syndicalist but more syndicalist than anarchist – as reflected in its flag not being as orthodoxly anarchist as the [plain one of the] CNT.

The CGT's logo, visible in many places online, uses a darker shade; see the header at http://www.cgt.org.es/, for example. Its flag, of which I've found
several photos, uses a (typically anarchist) bright one.